Magnesium alloys which are compared as the 21st Green Engineering Material possess a unique set of properties such as light weight, high strength-to-weight ratio, high thermal conductivity, dimensional stability and damping characteristics, good electromagnetic shielding and machinability as well as recyclability. However, magnesium alloys have a number of undesirable properties including high chemical reactivity and poor corrosion resistance that have hindered its widespread use in many applications. There...